Copy letter from Robert William Frederick Harrison to Dr J L E Dreyer, The Observatory, Armagh 'Dear Sir, I have your acknowledgment of the receipt of the Herschel MSS sent and am glad to learn that they arrived safely. I am very sorry to learn that the contents did not comprise all the MSS you require, since the packets sent are all we have been able to find so far. All I can now do is to cause still further search to be made. This shall be done at once and I trust may prove successful. In any case I will report later as to the result. The packet of MSS not required had better be retained, I think, and returned with the whole parcel later on.' 13 July 1910